linux-kernel - arch/arm/mach-omap2/cpuidle44xx.c:88: warning: expecting prototype for omap_enter_idle_[simple/coupled](). Prototype was for omap_enter_idle

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Message-ID: <202304292001.RvJU7sWm-lkp@intel.com>
Date:   Sat, 29 Apr 2023 20:54:15 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: arch/arm/mach-omap2/cpuidle44xx.c:88: warning: expecting prototype
 for omap_enter_idle_[simple/coupled](). Prototype was for
 omap_enter_idle_simple() instead

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   89d77f71f493a3663b10fa812d17f472935d24be
commit: 09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8 ARM: dove: multiplatform support
date:   1 year, 1 month ago
config: arm-randconfig-r034-20230429 (https://download.01.org/0day-ci/archive/20230429/202304292001.RvJU7sWm-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304292001.RvJU7sWm-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm/mach-omap2/cpuidle44xx.c:88: warning: expecting prototype for omap_enter_idle_[simple/coupled](). Prototype was for omap_enter_idle_simple() instead


vim +88 arch/arm/mach-omap2/cpuidle44xx.c

9db316b6bf0234 Paul Walmsley     2012-12-15  74  
98272660970a71 Santosh Shilimkar 2011-08-16  75  /**
db4f3dab629109 Santosh Shilimkar 2013-04-05  76   * omap_enter_idle_[simple/coupled] - OMAP4PLUS cpuidle entry functions
98272660970a71 Santosh Shilimkar 2011-08-16  77   * @dev: cpuidle device
98272660970a71 Santosh Shilimkar 2011-08-16  78   * @drv: cpuidle driver
98272660970a71 Santosh Shilimkar 2011-08-16  79   * @index: the index of state to be entered
98272660970a71 Santosh Shilimkar 2011-08-16  80   *
98272660970a71 Santosh Shilimkar 2011-08-16  81   * Called from the CPUidle framework to program the device to the
98272660970a71 Santosh Shilimkar 2011-08-16  82   * specified low power state selected by the governor.
98272660970a71 Santosh Shilimkar 2011-08-16  83   * Returns the amount of time spent in the low power state.
98272660970a71 Santosh Shilimkar 2011-08-16  84   */
db4f3dab629109 Santosh Shilimkar 2013-04-05  85  static int omap_enter_idle_simple(struct cpuidle_device *dev,
dd3ad97c5621aa Santosh Shilimkar 2011-12-25  86  			struct cpuidle_driver *drv,
dd3ad97c5621aa Santosh Shilimkar 2011-12-25  87  			int index)
dd3ad97c5621aa Santosh Shilimkar 2011-12-25 @88  {
dd3ad97c5621aa Santosh Shilimkar 2011-12-25  89  	omap_do_wfi();
dd3ad97c5621aa Santosh Shilimkar 2011-12-25  90  	return index;
dd3ad97c5621aa Santosh Shilimkar 2011-12-25  91  }
dd3ad97c5621aa Santosh Shilimkar 2011-12-25  92  

:::::: The code at line 88 was first introduced by commit
:::::: dd3ad97c5621aa853843dd5e6783ca787466158c ARM: OMAP4: CPUidle: Use coupled cpuidle states to implement SMP cpuidle.

:::::: TO: Santosh Shilimkar <santosh.shilimkar@...com>
:::::: CC: Kevin Hilman <khilman@...com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests